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Typescript API Safety

Category: Engineering  ·  Sub-category: languages  ·  Last updated:
lang:typescript
This skill should be used when writing API endpoints, handling external data, validating HTTP requests or responses, parsing user input, working with environment variables, designing type-safe API boundaries, integrating Zod for runtime validation, implementing Fastify with type providers, sharing types in monorepos, or setting up parse-don't-validate patterns. Trigger on: "API boundary", "parse don't validate", "Zod schema", "runtime validation", "validate request body", "safe parse", "schema-first", "type-safe API", "Fastify type provider", "shared types monorepo", "validate environment variables", "external data", "unknown input", "z.infer", "request validation", "response validation", "API contract".
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

The most dangerous data in any application is the data entering from the outside world. API responses, request bodies, environment variables, and file contents are all unknown at runtime — no matter what your TypeScript types say. The solution is a single guiding principle: parse, don't validate.

What this skill does

Typescript API Safety is a community-contributed Claude Code skill in the languages sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/typescript-api-safety/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Typescript API Safety Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 146,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/typescript-api-safety
curl -L https://claudskills.com/skills/typescript-api-safety/SKILL.md \
  -o ~/.claude/skills/typescript-api-safety/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/typescript-api-safety/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/typescript-api-safety/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\typescript-api-safety\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Typescript API Safety Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/typescript-api-safety/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Typescript API Safety skill do?
This skill should be used when writing API endpoints, handling external data, validating HTTP requests or responses, parsing user input, working with environment variables, designing type-safe API boundaries, integrating Zod for runtime validation, implementing Fastify with type providers, sharing types in monorepos, or setting up parse-don't-validate patterns. Trigger on: "API boundary", "parse don't validate", "Zod schema", "runtime validation", "validate request body", "safe parse", "schema-first", "type-safe API", "Fastify type provider", "shared types monorepo", "validate environment variables", "external data", "unknown input", "z.infer", "request validation", "response validation", "API contract".
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Typescript API Safety skill?
Use Typescript API Safety when your Claude Code task falls under the Engineering category — specifically in the languages area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Typescript API Safety" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Typescript API Safety skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Typescript API Safety is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
radesjardins. (2026). Typescript API Safety [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/typescript-api-safety/
BibTeX
@misc{typescript-api-safety-2026,
  author    = {radesjardins},
  title     = {Typescript API Safety [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/typescript-api-safety/}
}

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Security scan

Grade A · scanned 2026-07-06 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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